{"product_id":"gacoflex-s42-s4200-silicone-roof-coating-18-9ltr-drum","title":"GacoFlex S42 (S4200) Silicone Roof Coating - 18.9Ltr Drum","description":"\u003cp\u003eRestore and waterproof ageing roofs with GacoFlex S42, a solvent-free, single-component silicone roof coating available in White or Grey. Designed for suitable flat, low-slope and pitched roofs, it provides a practical refurbishment option without removing a sound existing roof covering.\u003c\/p\u003e\n\u003cp\u003eApplied by brush, roller or spray, GacoFlex S42 moisture-cures to form a seamless, fully adhered waterproof membrane. Its resistance to permanent ponding water and UV exposure makes it particularly suited to flat roofing applications.\u003c\/p\u003e\n\u003cp\u003eGacoFlex S42 forms the main waterproofing membrane within the GacoFlex silicone roof system. Supplied ready to use, it requires no mixing with a separate hardener.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e100% silicone coating – solvent-free and single-component.\u003c\/li\u003e\n\u003cli\u003eResists permanent ponding water – suitable for roof areas where standing water occurs.\u003c\/li\u003e\n\u003cli\u003eUV-stable protection – withstands exposure to sunlight and weathering.\u003c\/li\u003e\n\u003cli\u003eSeamless waterproof finish – forms a continuous membrane without laps or joints in the coating.\u003c\/li\u003e\n\u003cli\u003eFlexible application – apply using suitable spray equipment, a brush or roller.\u003c\/li\u003e\n\u003cli\u003eSolar-reflective White finish – initial solar reflectance of 0.87.\u003c\/li\u003e\n\u003cli\u003eHigh adhesion – bonds to many common roofing surfaces, subject to preparation and any specified primer or base coat.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGacoFlex S42 can be used to restore and protect a range of suitable, correctly prepared roof surfaces, including:\u003c\/li\u003e\n\u003cli\u003eFelt and asphalt flat roofs.\u003c\/li\u003e\n\u003cli\u003eSingle-ply roof membranes.\u003c\/li\u003e\n\u003cli\u003eProfiled metal roofs.\u003c\/li\u003e\n\u003cli\u003eFibre-cement and asbestos cement roofs, subject to appropriate assessment and specialist preparation.\u003c\/li\u003e\n\u003cli\u003eSpray polyurethane foam roofing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor bituminous roofs, apply GacoFlex A4271 Bleed Trap base coat before S42 to help prevent bitumen staining through the finish.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePail Size, Colours and Coverage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePail size - 18.9 litres.\u003c\/li\u003e\n\u003cli\u003eColours - White or Grey.\u003c\/li\u003e\n\u003cli\u003eApproximate coverage at 10-year film build - 33m² per pail.\u003c\/li\u003e\n\u003cli\u003eApproximate coverage at 20-year film build - 21m² per pail.\u003c\/li\u003e\n\u003cli\u003eApplication - Brush, roller or spray.\u003c\/li\u003e\n\u003cli\u003eCuring method - Moisture-curing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCoverage figures are approximate and depend on the surface texture, condition and application losses. Allow additional material for upstands and roof details. The film-build references do not, on their own, confirm a guarantee; any warranty is subject to the applicable system specification and manufacturer’s terms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePreparation and Application\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe existing roof must be sound, clean and suitably prepared before application. Address defects and prepare joints, penetrations and upstands in accordance with the specified system. Some substrates require a compatible primer or base coat, and adhesion testing may be necessary.\u003c\/p\u003e\n\u003cp\u003eCorrect preparation and detailing are essential to a successful roof coating application. The following complementary products are available separately:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/flatroofingsystems.co.uk\/products\/gacoflex-sf42-silicone-seam-sealant-18-9-litres\"\u003e\u003cstrong\u003eGacoFlex S42 Seam Sealant:\u003c\/strong\u003e\u003c\/a\u003e For sealing roof seams, fasteners and intricate details.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/flatroofingsystems.co.uk\/products\/gacoflex-a4271-bleed-trap-base-coat-for-felt-asphalt-roofs-18-9-litres\"\u003e\u003cstrong\u003eGacoFlex A4271 Bleed Trap:\u003c\/strong\u003e \u003c\/a\u003eA bleed-blocking base coat for use where required by the substrate specification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGacoPatch:\u003c\/strong\u003e For filling large cracks, splits and joints before applying the roof coating.\u003c\/p\u003e\n\u003cp\u003eAlways follow the current GacoFlex technical data sheet for substrate suitability, application conditions, coating thickness and curing requirements. Asbestos-containing roofs require specialist assessment and safe working methods before any preparation or coating work.\u003c\/p\u003e\n\u003cp\u003eOrder GacoFlex S42 Silicone Roof Coating from All Flat Roofing Supplies, with UK-wide delivery.\u003c\/p\u003e","brand":"Gaco","offers":[{"title":"Grey","offer_id":57601940914502,"sku":"S4222-5","price":390.0,"currency_code":"GBP","in_stock":true},{"title":"White","offer_id":57601940947270,"sku":"S4200-5","price":390.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0572\/1670\/files\/GacoflexS42Silicone.jpg?v=1792060157","url":"https:\/\/flatroofingsystems.co.uk\/products\/gacoflex-s42-s4200-silicone-roof-coating-18-9ltr-drum","provider":"Flat Roofing Systems","version":"1.0","type":"link"}